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f(-2)= -2 (-2)+3
= 4 + 3
= 7
f(3)= -2 (3) +3
= -6 + 3
= -3
b.) f(x)= -2x + 3
f(a)= -2a + 3
-7 = -2a + 3
-7 - 3 = -2a
-10 = -2a
5 = a
2.) a.) f(x)= 4x - 2
b.) f(x)= 4x - 2
f(p)= 4p - 2
8 = 4p - 2
8 + 2 = 4p
10 = 4p
2, 5 = p